Steering gear (without power steering) [Toyota Dyna Y50]

Removal the steering gear

1. Disconnect the steering knuckle and the longitudinal steering rod.

a) Loosen the bipod mounting nut, then remove the pin from the longitudinal rod.

b) Using a puller, remove the rod from the bipod.



c) Using a puller, disconnect the steering arm from the steering gear.



3. Remove the steering gear.

a) Unscrew the four mounting bolts and remove the steering gear.

Disassembling the steering mechanism

1. Loosen the air bleed screw and drain the oil from the crankcase.

2. Remove the end cover.

a) Unscrew the lock nut and four bolts.



b) Remove the end cover by turning the adjusting screw clockwise.



3. Using a plastic hammer, tap the end of the bipod shaft and remove the shaft.



4. Using a special wrench, unscrew the lock nut.





5. Using a special key, unscrew the adjusting screw.



6. Remove the screw assembly with the ball nut from the housing.

Caution: Do not disassemble the ball nut. Be careful that the balls do not hit the bottom of the screw.

Checking the steering gear

1. Checking the screw assembly with the ball nut.

a) Check the screw for wear and damage.



b) Check that the ball nut moves downwards smoothly under its own weight.

Repair or replace the screw if necessary.

Caution: Be careful not to let the balls hit the bottom of the screw.

2. Replace the bearing if necessary.

3. Checking the axial clearance of the steering knuckle shaft.

a) Using a feeler gauge, measure the gap.

• Maximum clearance - 0.05 mm or less

b) If the gap exceeds the maximum permissible value, select a new washer.

• Washer thickness - 1.95; 2,00; 2.05 mm

4. Check the end cap and end cap bushing for wear and damage. Measure the inside diameter of the bushing.

• Inner diameter: 32.000 - 32.025 mm

Replace the cover if necessary.

5. Check the steering gear housing for wear and damage. Measure the inside diameter.

• Inner diameter: 32.000 - 32.025 mm

Steering gear assembly

1. Apply MP type grease to bushings, bearings and seals.

2. Install the propeller bearings onto the shaft and insert the propeller assembly with the ball nut into the steering gear housing.

3. Install and adjust the rear bearing holder.

a) Apply sealant to the holder and tighten it with a special wrench.







(The material was taken from a resource Toyotaman.ru)



b) Measure the bearing preload in both directions. Tighten the adjusting screw if necessary.

• Preload (initial) - 0.34 - 0.49 Nm

c) Hold the rear bearing holder with a special wrench and tighten the lock nut.

• Tightening torque - 147 Nm

Note: Check the bearing preload again.

5. Install the steering knuckle shaft.

a) Install the adjusting screw and thrust washer of the bipod shaft.

b) Tighten the ball nut to the center of the screw. Insert the steering knuckle shaft into the steering gear housing so that the central teeth engage.



6. Install the end cover.



a) Apply sealant to the gasket and cover.

b) Install the gasket on the cover.

c) Loosen the adjusting screw as much as possible.

d) Tighten the cover with four bolts.

• Tightening torque - 98 Nm

7. Set the screw assembly with the ball nut to the neutral position.

a) Count the total number of turns by turning in one direction and turn in the opposite direction by half the number of turns.

b) This will be the neutral position, which must be marked with alignment marks on the shaft and housing.



8. Using the special tool, adjust the preload.

Note: The screw and ball nut assembly must be in the neutral position.

• Preload (initial) - 0.78 - 1.08 Nm

9. Hold the adjusting screw with a screwdriver and tighten the lock nut.

• Tightening torque - 44 Nm

Note: Check the preload again.

10. Checking the play of the steering knuckle shaft.

Align the marks on the pitman arm shaft and the pitman arm itself. Make sure that the pitman arm shaft has no play within the 100° rotation angle in either direction of the neutral position.
11. Fill with oil.

Installing the steering gear

1. Install the steering gear and tighten the bolts.

• Tightening torque - 73 Nm

2. Install the steering column assembly.

3. Install the steering knuckle and trailing arm.

a) Align the marks on the bipod and the shaft. Place the bipod on the shaft.

b) Install the longitudinal steering rod into the steering knuckle, tighten the nut and install the pin.

• Tightening torque - 91 Nm

c) Tighten the bipod mounting nut.

Tightening torque:

• DYNA 100 — 177 Nm
• DYNA 150 — 172 Nm

4. Check the steering wheel center position.